| // Copyright (c) 2012 Ecma International. All rights reserved. |
| // This code is governed by the BSD license found in the LICENSE file. |
| |
| /*--- |
| esid: sec-array.prototype.indexof |
| es5id: 15.4.4.14-3-19 |
| description: > |
| Array.prototype.indexOf - value of 'length' is an Object which has |
| an own toString method. |
| ---*/ |
| |
| // objects inherit the default valueOf() method from Object |
| // that simply returns itself. Since the default valueOf() method |
| // does not return a primitive value, ES next tries to convert the object |
| // to a number by calling its toString() method and converting the |
| // resulting string to a number. |
| |
| var obj = { |
| 1: true, |
| 2: 2, |
| |
| length: { |
| toString: function () { |
| return '2'; |
| } |
| } |
| }; |
| |
| assert.sameValue(Array.prototype.indexOf.call(obj, true), 1, 'Array.prototype.indexOf.call(obj, true)'); |
| assert.sameValue(Array.prototype.indexOf.call(obj, 2), -1, 'Array.prototype.indexOf.call(obj, 2)'); |